Official 27 Lec 3
Question 1 of 6
What does the professor mainly discuss?

A.

Comparisons between land animals and ocean-going animals of the Mesozoic era.

B.

Comparisons between sauropods and modern animals.

C.

Possible reasons why sauropods became extinct.

D.

New theories about the climate of the Mesozoic era.

正确答案:B

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